WorksheetsConcrete & Structural Laboratory Cover Sheet
Total questions: 40
Worksheet time: 20mins
According to the apparatus table for the buckling test, what is the purpose of the Buckling machine?
To apply compressive force to a material to determine its buckling strength
To measure the width of the strut with high precision
To mark reference lines along the strut length
To cool the specimen to reduce thermal expansion
According to the apparatus table for the buckling test, what is the purpose of the Digital Caliper?
To measure thickness and width of the strut accurately
To apply axial load to the strut
To record the maximum buckling load
To align the support combination
According to the apparatus table for the buckling test, what is the purpose of the Ruler?
To measure the deflection results
To set the channel 1 metre to zero
To tension the joint screw
To check surface roughness
In the apparatus table for the buckling test, what is a Strut?
A structural element that bends or stretches as a result of compression forces
A device used to align pinned supports
An instrument to measure axial load
A protective casing for the buckling machine
According to the 4.0 PROCEDURE flowchart for the buckling test, what measurement is taken at the start for the fix to the pinned support combination?
Measure the width and thickness of each strut
Record the maximum buckling load
Measure the deflection with the ruler
Set the supports to pinned–pinned
In the 4.0 PROCEDURE flowchart for the buckling test, what is done first after the initial measurements?
Set the channel 1 metre to zero
Tighten the joint screw
Measure the deflection
Record the crookedness of the strut
According to the procedure flowchart, what check is made immediately after putting the strut in place at the joint?
Ensure that the strut touches
Record the maximum buckling load
Set the supports to pinned–pinned
Measure the thickness with a caliper
In the 4.0 PROCEDURE flowchart, when there is no more rise in load, what action should be taken?
Tighten the joint by adjusting the screw and rotating the hand wheel
Reduce the applied load to zero
Replace the strut with a new specimen
Switch the support to fixed–fixed
According to the procedure flowchart, what step follows recording the maximum buckling load that can be applied?
Measure the deflection by holding the ruler upright
Set the channel 1 metre to zero
Apply the fix to the upper portion of the joint
Record the crooked strut measurement
In the continuation of the 4.0 PROCEDURE flowchart, what is recorded immediately after measuring the deflection?
The measurement of the crooked strut
The channel zero setting
The ruler calibration value
The temperature of the specimen
According to the procedure flowchart, what is done after recording the crooked strut measurement?
Apply the fix to the upper portion of the joint
Stop the test
Set the supports directly to pinned–pinned
Tighten the joint screw again
In the 4.0 PROCEDURE flowchart, how are pinned to pinned ends obtained?
Turn the fix upside down
Loosen the hand wheel completely
Increase the load until yielding
Use the digital caliper for alignment
Using Table 7 for pinned–pinned ends, the buckling loads (N) for five struts are: Strut 1 (Length 320 mm): Experimental 53, Theoretical 88.50; Strut 2 (370 mm): Experimental 53, Theoretical 66.20; Strut 3 (420 mm): Experimental 41, Theoretical 51.40; Strut 4 (470 mm): Experimental 53, Theoretical 41.0; Strut 5 (520 mm): Experimental 27, Theoretical 33.50. Based on these data, which conclusion is best supported about the relationship between experimental and theoretical loads for this end condition?
The experimental loads exceed the theoretical loads for all five struts.
The theoretical loads exceed the experimental loads for all five struts.
Experimental and theoretical loads are equal for all five struts.
The relationship alternates with no clear pattern across the five struts.
For Table 7, use the percentage error formula (experimental − theoretical) ÷ theoretical × 100%. Using Strut 1 values (Experimental 53 N, Theoretical 88.50 N), what is the percentage error?
−40.11%
−22.95%
+39.33%
+6.49%
Using Table 8 for fixed–pinned ends, the buckling loads (N) are: Strut 1 (300 mm): Experimental 165, Theoretical 134.20; Strut 2 (350 mm): Experimental 105, Theoretical 98.60; Strut 3 (400 mm): Experimental 90, Theoretical 75.50; Strut 4 (450 mm): Experimental 64, Theoretical 59.60; Strut 5 (500 mm): Experimental 31, Theoretical 48.30. Which strut(s) show a negative percentage error (experimental less than theoretical)?
Only Strut 1
Only Strut 5
Struts 1 and 2
Struts 2, 3, and 4
For Table 8, apply the percentage error formula (experimental − theoretical) ÷ theoretical × 100%. Using Strut 1 values (Experimental 165 N, Theoretical 134.20 N), what is the percentage error?
+22.95%
−35.82%
+6.49%
−13.41%
Using Table 9 for fixed–fixed ends, the buckling loads (N) are: Strut 1 (280 mm): Experimental 322, Theoretical 231.10; Strut 2 (330 mm): Experimental 144, Theoretical 166.30; Strut 3 (380 mm): Experimental 187, Theoretical 125.50; Strut 4 (430 mm): Experimental 109, Theoretical 98.0; Strut 5 (480 mm): Experimental 75, Theoretical 78.60. Select all struts that have negative percentage error (experimental less than theoretical).
Strut 1
Strut 2
Strut 3
Strut 4
Strut 5
For Table 9, use the percentage error formula (experimental − theoretical) ÷ theoretical × 100%. Using Strut 1 values (Experimental 322 N, Theoretical 231.10 N), what is the percentage error?
+39.33%
−13.41%
+19.21%
−4.58%
Considering the instruction to compare Euler’s critical load from experiment with theoretical (and simulation, if available) values, and using the summaries from Tables 7–9, which overall statement best captures the relationship and errors across the three end conditions?
For all end conditions, experimental loads are consistently higher than theoretical loads, indicating uniformly positive errors.
Across end conditions, pinned–pinned shows theoretical > experimental for all struts; fixed–pinned is mixed with one negative error at Strut 5; fixed–fixed often has experimental > theoretical with negative errors only at Struts 2 and 5.
Simulation loads dominate the results in all tables, with experimental values rarely reported.
Errors are uniformly near zero for all struts and end conditions, indicating perfect agreement.
Using the provided plots for pinned–pinned, fixed–pinned, and fixed–fixed end conditions, identify the overall relationship between column length and Euler’s critical (buckling) load and the general pattern between theoretical and experimental loads across these end conditions.
Increasing length decreases Euler’s critical load across all end conditions; experimental values are consistently lower than theoretical only for the pinned–pinned case, while fixed–pinned and fixed–fixed show mixed deviations.
Increasing length increases Euler’s critical load for all end conditions; experimental values are always greater than theoretical.
There is no consistent relationship between length and Euler’s critical load; experimental and theoretical values vary randomly without a pattern.
Increasing length decreases Euler’s critical load only for the pinned–pinned case; fixed–pinned and fixed–fixed conditions show an increase in critical load with length.
If you were required to draw the column’s load versus deflection graph, explain the experiment procedure and suggest a method to obtain the critical load from the graph. The worksheet shows Figure 5 (Buckling load vs Deflection graph) with load on the vertical axis and deflection on the horizontal axis for different end conditions, and Figure 6 (Southwell Plot: deflection y vs y/P) with linear trendlines and annotated slopes and intercepts.
Measure the strut’s dimensions; fix the ends for the chosen condition; apply load incrementally until a steady deflection is reached at each step; record load P and deflection y to plot Load (N) vs Deflection (mm); estimate the critical load using the Southwell method by plotting y versus y/P and extrapolating the linear region to obtain P_cr from the intercept.
Measure dimensions; apply one large load to cause failure; plot Deflection versus Time; read the peak deflection as the critical load.
Skip dimensional measurements; vary load randomly; plot Stress versus Strain; take the elastic slope as the critical load.
Load the strut cyclically to buckling and unloading; plot Load versus Deflection; take the maximum load before permanent set as the critical load without any extrapolation.
Based on the summary comparing experiment results with theoretical values for different end conditions, which condition showed measurements that aligned most closely with theory? Conditions considered: pinned-to-pinned, fixed-to-pinned, and fixed-to-fixed.
Pinned-to-pinned
Fixed-to-pinned
Fixed-to-fixed
All three were similarly close to theory
According to the summary of results, which end conditions exhibited more significant differences from theoretical values and were associated with errors during the experiment? Select all that apply.
Pinned-to-pinned
Fixed-to-pinned
Fixed-to-fixed
When applying the load in the strut buckling experiment, which procedure is recommended to ensure accurate results?
Apply the load slowly and steadily
Apply the full load at once to reach buckling quickly
Rapidly vary the load to observe fluctuations
Begin with a very high load and then reduce it
Which items are specifically mentioned as needing regular checking and calibration to maintain accuracy in the strut buckling experiment? Select all that apply.
Digital Force Display
Load whirler
Vernier caliper
Stopwatch
What setup precaution is recommended for the strut to prevent wobbling and improve measurement reliability under the specified end conditions?
Fix the strut tightly according to the given end condition
Leave the strut loosely attached so it can self-align
Clamp only one end firmly and leave the other free
Allow the strut to rotate freely at both ends
Based on the pictured strut buckling setup, what activity is being carried out?
Receiving a briefing by the lab technician
Performing a tensile test on a specimen
Packing the equipment after the session
Conducting an unrelated safety drill
According to the caption for the image near the strut buckling frame, which task is being performed?
All the data were being recorded and the procedure had been jot down
Calibrating the Digital Force Display
Changing the pinned end to fixed end
Assembling the test frame components
In the image showing the control panel of the buckling apparatus, what action is being performed?
Calibrating the Digital Force Display
Measuring specimen thickness with a micrometer
Cleaning the machine surface
Reviewing a general safety checklist
What change to the end condition of the strut is depicted in the image at the test frame?
Changing the pinned end to fixed end
Switching from fixed end to pinned end
Zeroing a displacement gauge before loading
Applying the final compressive load
From the APPARATUS section on the worksheet header, what task are you instructed to complete?
List out equipment and apparatus used in the experiment complete with figures.
Calculate theoretical buckling loads for all strut lengths.
Write a full literature review of past experiments.
Submit a safety incident report for the laboratory.
From the PROCEDURES section on the worksheet header, what specific instruction is given?
Establish experimental procedures based on the practical session and use flowcharts.
Record the purchase cost of all apparatus in a budget table.
Derive Euler’s column formula from first principles.
Draw a complete stress–strain curve for aluminum.
In the RESULTS area under Experimental data, which items are explicitly listed to be provided with units? Select all that apply.
Width of the strut (mm)
Thickness of the strut (mm)
Second moment of inertia of member (mm)
Young’s modulus of the aluminum strut (mm)
In the Data collection tables, which column headings appear for every strut test? Select all that apply.
Strut number
Length (mm)
Buckling load (N)
Deflection (mm)
Elastic modulus (GPa)
According to the Data collection section, which end condition is specified for Table 1?
Pinned to pinned ends condition
Fixed to pinned ends condition
Fixed to fixed ends condition
Free to free ends condition
According to the Data collection section, which end condition is specified for Table 2?
Pinned to pinned ends condition
Fixed to pinned ends condition
Fixed to fixed ends condition
Pinned to free ends condition
According to the Data collection section, which end condition is specified for Table 3?
Pinned to pinned ends condition
Fixed to pinned ends condition
Fixed to fixed ends condition
Pinned to roller ends condition
At the top of the worksheet, what course code appears with the title "INFRASTRUCTURAL PROJECT (STUDIO 3)"?
BET2334
BET2234
CET2334
BET3334
Which faculty is named in the worksheet header beneath the course title?
Faculty of Civil Engineering Technology
Faculty of Mechanical and Automotive Engineering
Faculty of Applied Sciences
Faculty of Architecture and Environmental Design
Which university name is printed beneath the faculty in the header?
Universiti Malaysia Pahang
Universiti Malaya
Universiti Teknologi Malaysia
Universiti Putra Malaysia
